public ReturnIndicator CheckCC(string CardNumber)
{
ReturnIndicator ri = new ReturnIndicator();
ri.CardValid = false;
byte[] number = new byte[16]; // number to validate
// Remove non-digits
int len = 0;
for (int i = 0; i < CardNumber.Length; i++)
{
if (char.IsDigit(CardNumber, i))
{
if (len == 16) return ri; // number has too many digits
number[len++] = byte.Parse(CardNumber[i].ToString());
}
}
// Use Luhn Algorithm to validate
int sum = 0;
for (int i = len - 1; i >= 0; i--)
{
if (i % 2 == len % 2)
{
int n = number[i] * 2;
sum += (n / 10) + (n % 10);
}
else
sum += number[i];
}
ri.CardValid = (bool)(sum % 10 == 0);
if ((ri.CardValid == true))
{
switch (CardNumber.Substring(0, 1))
{
case "3":
ri.CardType = "AMEX/Diners Club/JCB";
break;
case "4":
ri.CardType = "VISA";
break;
case "5":
ri.CardType = "MasterCard";
break;
case "6":
ri.CardType = "Discover";
break;
default:
ri.CardType = "Unknown";
break;
}
}
else
{
ri.CardType = "NONE";
}
return ri;
}
public ReturnIndicator CheckCC(string CardNumberEncrypted)
{
ReturnIndicator ri = new ReturnIndicator();
ri.CardValid = false;
string CardNumber = DecryptTripleDES(CardNumberEncrypted, "aptech");
byte[] number = new byte[16];
int len = 0;
for (int i = 0; i < CardNumber.Length; i++)
{
if (char.IsDigit(CardNumber, i))
{
if (len == 16) return ri;
number[len++] = byte.Parse(CardNumber[i].ToString());
}
}
int sum = 0;
for (int i = len - 1; i >= 0; i--)
{
if (i % 2 == len % 2)
{
int n = number[i] * 2;
sum += (n / 10) + (n % 10);
}
else
sum += number[i];
}
ri.CardValid = (bool)(sum % 10 == 0);
if ((ri.CardValid == true))
{
switch (CardNumber.Substring(0, 1))
{
case "3":
ri.CardType = "AMEX/Diners Club/JCB";
break;
case "4":
ri.CardType = "VISA";
break;
case "5":
ri.CardType = "MasterCard";
break;
case "6":
ri.CardType = "Discover";
break;
default:
ri.CardType = "Unknown";
break;
}
}
else
{
ri.CardType = "NONE";
}
return ri;
}
public ReturnIndicator CheckCC(string CardNumberEncrypted)
{
ReturnIndicator ri = new ReturnIndicator();
ri.CardValid = false;
string CardNumber = DecryptTripleDES(CardNumberEncrypted, "aptech");
byte[] number = new byte[16];
int len = 0;
for (int i = 0; i < CardNumber.Length; i++)
{
if (char.IsDigit(CardNumber, i))
{
if (len == 16)
{
return(ri);
}
number[len++] = byte.Parse(CardNumber[i].ToString());
}
}
int sum = 0;
for (int i = len - 1; i >= 0; i--)
{
if (i % 2 == len % 2)
{
int n = number[i] * 2;
sum += (n / 10) + (n % 10);
}
else
{
sum += number[i];
}
}
ri.CardValid = (bool)(sum % 10 == 0);
if ((ri.CardValid == true))
{
switch (CardNumber.Substring(0, 1))
{
case "3":
ri.CardType = "AMEX/Diners Club/JCB";
break;
case "4":
ri.CardType = "VISA";
break;
case "5":
ri.CardType = "MasterCard";
break;
case "6":
ri.CardType = "Discover";
break;
default:
ri.CardType = "Unknown";
break;
}
}
else
{
ri.CardType = "NONE";
}
return(ri);
}
